Present a Popover view from UIToolbar barButtonItem - swift

Question

Screenshot of the gap
I need to present a popover view from a UIBarbuttonItem in a UIToolbar. But there exists a gap between the popover view and the toolbar.
private func addToolbar() {
let toolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: view.frame.size.width, height: 50))
let item1 = UIBarButtonItem(image: UIImage(systemName: "pencil"), style: .plain, target: self, action: #selector(item1Pressed(_:)))
let item2 = UIBarButtonItem(image: UIImage(systemName: "house"), style: .plain, target: self, action: #selector(item2Pressed(_:)))
toolBar.sizeToFit()
toolBar.items = [item1, item2]
textField.inputAccessoryView = toolBar
}
class SearchViewController: UIViewController {
let searchBar = UISearchBar()
weak var viewControllerDelegate: SearchViewControllerDelegate?
override func viewDidLoad() {
super.viewDidLoad()
setupView()
setupSearchbar()
}
private func setupView() {
view.backgroundColor = .white
navigationController?.navigationBar.prefersLargeTitles = true
self.title = "Search"
}
private func setupSearchbar() {
searchBar.sizeToFit()
searchBar.placeholder = "Search test"
searchBar.showsCancelButton = true
searchBar.delegate = self
self.navigationItem.titleView = searchBar
}
}
I tried setting the sourceRect of the presented popover view, but the popover view doesn't move down below a certain point.
#objc private func item1Pressed(_ sender: UIBarButtonItem) {
let vc = SearchViewController()
vc.viewControllerDelegate = self
let navVC = UINavigationController(rootViewController: vc)
navVC.modalPresentationStyle = .popover
navVC.popoverPresentationController?.delegate = self
navVC.popoverPresentationController?.permittedArrowDirections = .any
navVC.preferredContentSize = CGSize(width: 500, height: 200)
navVC.popoverPresentationController?.sourceItem = sender
var location = CGPoint(x: 0, y: 0)
if let barItemView = sender.value(forKey: "view") as? UIView {
let barFrame = barItemView.frame
let rect = barItemView.convert(barFrame, to: view)
location = rect.origin
}
navVC.popoverPresentationController?.sourceRect = CGRect(x: location.x, y: location.y+100, width: 0, height: 0)
present(navVC, animated: true)
}